Design And Performance Analysis Of The Hydraulic Hybrid Cutting System For Drum Shearer

As one of the main mining equipment for fully mechanized coal mining face, the coal mining machine is widely used in various sizes of coal mine. Its function is to cut coal and coal loading. Cutting coal is mainly carried out by impact and collision between rollers picks coal, so as to achieve the purpose of coal fall. Coal loading is mainly achieved through the blade surface of spiral drum helical.Thus the performance of the cutting part directly determines the shearer working performance.Shearer is mainly achieved through the spiral drum helical blade surface. Because the drum rotational speed of the shearer is constant, the drum shearer has to adjust the traction speed in order to adapt to the variation of coal seam, which leads to the problem of dust, low lump coal rate, poor working environment, have great limitations on cutting performance improvement of shearer. So in this paper, basied on the analysis and research, a kind of drum shearer cutting system, which can realize rotational speed regulation of shearer drum, is designed. The new system make drum shearer achieves better adaptability in different conditions of coal seams.① The structure of drum shearer, coal physical and mechanical properties, cutting thickness and roller load characteristics are analyzed, obtain the influence of traction speed and the rotation speed of the roller on the cutting thickness and roller load, the final analysis drawn that of achieving the drum rotational speed regulation is necessary.② Based on the analysis of shearer working process and the planetary gear mechanism, the different powertrain schemes are chosed. Finally, based on traditional drum shearer cutting system, a kind of hydraulic hybrid cutting system was designed. That the input ends of differential planetary gear respectively transmit the power of cutting motor and hydraulic motor, the power of hydraulic motor comes from hydraulic system of height adjustment. Utilizing the power coupling function of planetary mechanism, the drum rotational speed can be adjusted by changing the displacement of hydraulic pump. In addition, the parameters matching of mechanical system and hydraulic system are completed.③ The mathematical models of mainly parts including planetary mechanism, hydraulic pump, hydraulic motor, etc. were established. The mainly parts simulation models, system simulation model, load model and PID controller model are implemented in the AMESim and MATLAB/Simulink simulation environment. The co-simulation of AMESim-Simulink is completed. The tracking performance of hydraulic motor speed and drum rotational speed, dynamic response and cushioning performance were simulated and analyzed. The feasibility of the designed hydraulic hybrid cutting system is test and verify. The simulation results show that the motor speed and drum rotational speed have good tracking performance and dynamic response, and hydraulic systems can mitigate the impact of mutation load.